I just ordered some quick connects for my HERMS system I am building. I searched high and low and found these to be the best parts at the cheapest price. If you buy these from any of the brew stores you will pay much more for the same thing. The trick is when you order them that the coupling is 1/2 the part and the insert with the barb fitting is the other part. The other trick is both of these parts are straight through or valved. I will plumb these to a March pump MDXT. They are food grade high temp.
Here's what I got based on 1/2 copper fittings elsewhere and 1/2 ID reinforced food grade tubing.
HFC22812 -1/2 hose barb non-valved in line
HFCD22812- 1/2 hose barb valved in line
HFC10812- 1/2 NPT non valved CPC coupling body
HFC10612 -3/8 NPT non valved CPC coupling body
http://quickcouplings.net/osc/index.php?cPath=21_29